linux-kernel - Re: [RFC PATCH] scsi, block: fix duplicate bdi name registration crashes

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Message-ID: <CAPcyv4jJ5VMNueBTkYhTS=DmAQVDT6qJV0Do86ZNVGLGoTJ=gQ@mail.gmail.com>
Date:   Mon, 30 Jan 2017 13:53:36 -0800
From:   Dan Williams <dan.j.williams@...el.com>
To:     Christoph Hellwig <hch@....de>
Cc:     "Martin K. Petersen" <martin.petersen@...cle.com>,
        Jens Axboe <axboe@...nel.dk>, linux-block@...r.kernel.org,
        linux-scsi <linux-scsi@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        James Bottomley <James.Bottomley@...senpartnership.com>,
        Bart Van Assche <bart.vanassche@...disk.com>,
        Omar Sandoval <osandov@...ndov.com>
Subject: Re: [RFC PATCH] scsi, block: fix duplicate bdi name registration crashes

On Mon, Jan 30, 2017 at 4:24 AM, Christoph Hellwig <hch@....de> wrote:
> Hi Dan,
>
> this looks mostly fine to me.  A few code comments below, but except
> for this there is another issue with it:  We still have drivers
> that share a single request_queue for multiple gendisks, so I wonder

scsi drivers or others? If those drivers can switch to dynamically
allocated devt (GENHD_FL_EXT_DEVT), then they don't need this fix.